The term 'male slave' can be described as a BONDMAN, which is a seven-letter word. A BONDMAN is a man who is legally bound to serve another person or entity, usually in exchange for wages or other benefits. Bondmen were common in many societies throughout history, and were often used as laborers or servants. In some cases, they were also used as soldiers or bodyguards. Bondmen were typically owned by their masters, and were not allowed to leave without permission.